7. To determine H2S, 50.00 cm3 0.01960 N was added to 25.00 cm3 of a solution. iodine solution, after which the excess of iodine that did not enter into the reaction was titrated to 0.02040 N. thiosulfate solution, which was spent 11.00 cm3. How many grams of H2S are contained in 1 dm3 of the test solution?
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